Physics
Oscillation
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#73 In damped oscillations, the amplitude:
A) decreases with time
B) increases with time
C) remains constant
D) depends on velocity
#74 The period $T$ of a simple pendulum is:
A) $T = 2\pi\sqrt{\frac{g}{L}}$
B) $T = \frac{L}{g}$
C) $T = \frac{1}{g}$
D) $T = 2\pi \sqrt{\frac{L}{g}}$
#75 Resonance occurs when the driving frequency is:
A) less than the natural frequency
B) greater than the natural frequency
C) twice the natural frequency
D) equal to the natural frequency
#76 At the maximum displacement in SHM, the velocity is:
A) zero
B) undefined
C) maximum
D) half of maximum
#77 The acceleration in SHM is given by:
A) $a(t) = A\omega^2$
B) $a(t) = \omega x(t)$
C) $a(t) = -A\omega^2 \cos(\omega t + \phi)$
D) $a(t) = -\omega^2 x(t)$
#78 At the maximum displacement in SHM, the velocity is:
A) zero
B) maximum
C) undefined
D) half of maximum
#79 The amplitude of an oscillating system at resonance:
A) increases significantly
B) remains constant
C) becomes zero
D) decreases
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